[feat] linkcard self-hosting

_config.yml

@@ -280,6 +280,11 @@ footer:
 
 ######## Tag Plugins ########
 tag_plugins:
+  # {% link %}
+  linkcard:
+    # 设置 api 可以自动提取网页标题、图标，服务部署方法：https://github.com/xaoxuu/site-info-api/
+    # 接口测试通过后，把按钮的 href 部分替换成 ${href} 之后填写到下方，例如：https://api.vlts.cc/site_info/v1?url=${href}
+    api: 
   # {% box %} / {% note %}
   note:
     default_color: '' # light, dark, red, orange, yellow, green, cyan, blue, purple, warning, error

scripts/tags/lib/link.js

@@ -10,6 +10,13 @@
 module.exports = ctx => function(args) {
   const full_url_for = require('hexo-util').full_url_for.bind(ctx)
   args = ctx.args.map(args, ['icon', 'desc'], ['url', 'title'])
+  if (args.url == null) {
+    return '';
+  }
+  args.api = ctx.theme.config.tag_plugins.linkcard.api
+  if (args.api) {
+    args.api = args.api.replace('${href}', args.url)
+  }
   var autofill = []
   if (!args.title) {
     autofill.push('title')
@@ -27,6 +34,9 @@ module.exports = ctx => function(args) {
     el += ' target="_blank" rel="external nofollow noopener noreferrer"'
   }
   el += ' cardlink'
+  if (args.api) {
+    el += ` api="${args.api}"`
+  }
   el += ' autofill="'
   el += autofill.join(',')
   el += '"'

source/js/plugins/linkcard.js

@@ -30,11 +30,11 @@ function setCardLink(nodes) {
   nodes = 'forEach' in (nodes || {}) ? nodes : document.querySelectorAll('a[cardlink]')
   nodes.forEach((el) => {
     // If it is not a tag element then it is not processed
-    if (el.nodeType !== 1) return
+    if (el.nodeType !== 1) return;
     el.removeAttribute('cardlink');
-    const link = el.href;
-    const api = 'https://api.vlts.cc/site_info/v1?url=';
-    fetch(api + link).then(function(response) {
+    const api = el.getAttribute('api');
+    if (api == null) return;
+    fetch(api).then(function(response) {
       if (response.ok) {
         return response.json();
       }